Event Detail Information
CANCELLED: Physics Colloquium:"The Sounds of Broken Symmetry in Superfluid Helium"
The concepts of "spontaneous symmetry breaking’’, "generalized rigidity’’, and ``collective modes’’ play an important role in theoretical physics. Indeed much of the phenomenology of condensed matter can be understood in terms of these concepts within the framework of quantum mechanics and statistical mechanics. The story I tell is a synthesis of ideas drawn from hydrodynamics, atomic and optical physics, combined with the dynamical manifestations of spontaneous symmetry breaking in superfluid 3He (the light isotope of Helium). The phenomena I describe include the experimental discovery of transverse current waves ("transverse sound’’) that propagate in the superfluid phase of liquid 3He, and the detection of broken time-reversal symmetry and chiral edge currents in a superfluid film of 3He.